2112310231221 has 16 divisors (see below), whose sum is σ = 2997536264064. Its totient is φ = 1318503911424.

The previous prime is 2112310231211. The next prime is 2112310231261. The reversal of 2112310231221 is 1221320132112.

It is not a de Polignac number, because 2112310231221 - 2¹⁷ = 2112310100149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112310231201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107290281 + ... + 107309966.

It is an arithmetic number, because the mean of its divisors is an integer number (187346016504).

Almost surely, 2^{2112310231221} is an apocalyptic number.

It is an amenable number.

2112310231221 is a deficient number, since it is larger than the sum of its proper divisors (885226032843).

2112310231221 is a wasteful number, since it uses less digits than its factorization.

2112310231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214600460.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 2112310231221 its reverse (1221320132112), we get a palindrome (3333630363333).

The spelling of 2112310231221 in words is "two trillion, one hundred twelve billion, three hundred ten million, two hundred thirty-one thousand, two hundred twenty-one".